我有一个Fragment
类,可以在ListView
中显示我数据库中的所有内容,并且我有一个扩展SimpleCursorAdapter
的内部类,以使用ListView
中的按钮
因此,在列表视图的每个元素中,我有几个TextView
和2个按钮。使用我的以下代码,我可以使用按钮监听器来查看ListView
内的按钮。但是在我的监听器中,我希望将TextView
的内容放在与我单击的按钮相同的元素内。但是,当我点击按钮显示我的TextView
时,它会显示我ListView
的最后一个元素,我不知道为什么!
例如,如果我的ListView
中有3个元素,就像这样:
_id = 1, name = "bob"
_id = 2, name = "john"
_id = 3, name = "bobby"
这些元素中的每一个都显示一个按钮以显示ID,但如果我点击bob内的按钮,我会得到“id = 3”。约翰和鲍比也一样。如果我有一个新元素,我会得到他的ID
我的侦听器位于内部类MySimpleCursorAdapter
的绑定函数中。
这是我的Fragment
班级:
public class ViewCardEditor extends Fragment implements LoaderManager.LoaderCallbacks<Cursor> {
public static final String authority = "com.example.jean.cartememoire.CardContentProvider";
public String[] from;
public final int[] to = {R.id.idList, R.id.themeList, R.id.questionList, R.id.reponseList, R.id.difficultList};
StockCard stock;
ViewGroup container;
ListView listView;
MySimpleCursorAdapter adapter;
private ArrayList<String> data = new ArrayList<String>();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup c,
Bundle savedInstanceState) {
container = c;
View view = inflater.inflate(R.layout.fragment_view_card_editor, container, false);
stock = new StockCard(c.getContext());
from = new String[]{stock._ID,
stock.THEME,
stock.QUESTION,
stock.REPONSE,
stock.DIFFICULTE};
// Inflate the layout for this fragment
if (container != null) {
container.removeAllViews();
}
//listView.setAdapter(new MyListAdapter(container.getContext(), R.layout.card_stock, data));
//View view_cs = LayoutInflater.from(container.getContext()).inflate(R.layout.card_stock, null);
//Supprimer = (Button) view_cs.findViewById(R.id.buttonDelete);
//Modifier = (Button) view_cs.findViewById(R.id.buttonModifier);
databaseView(view);
return view;
}
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
Uri.Builder builder = new Uri.Builder();
Uri uri = builder.scheme("content").authority(authority)
.appendPath(stock.STOCK_TABLE).build();
return new CursorLoader(container.getContext(), uri, from,
null, null, null);
}
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
adapter.swapCursor(data);
}
public void onLoaderReset(Loader<Cursor> loader) {
adapter.swapCursor(null);
}
public void databaseView(View view)
{
ArrayList<String> list;
Cursor cursor = stock.getData();
listView = (ListView) view.findViewById(R.id.listView);
adapter = new MySimpleCursorAdapter(container.getContext(), R.layout.card_stock, null, from, to,0);
listView.setAdapter(adapter);
LoaderManager manager = getLoaderManager();
manager.initLoader(0, null, this);
}
public void deleteOneCard(int id)
{
Uri.Builder builder = new Uri.Builder();
builder.scheme("content").authority(authority).appendPath(stock.STOCK_TABLE);
ContentUris.appendId(builder, id);
Uri uri = builder.build();
ContentResolver resolver = container.getContext().getContentResolver();
resolver.delete(uri, null, null);
}
private class MySimpleCursorAdapter extends SimpleCursorAdapter
{
ViewHolder vh;
public MySimpleCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to, int flags) {
super(context, layout, c, from, to, flags);
}
public View newView(Context _context, Cursor _cursor, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) _context.getSystemService(_context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.card_stock, parent, false);
vh = new ViewHolder();
vh.idList = (TextView) view.findViewById(R.id.idList);
vh.themeList = (TextView) view.findViewById(R.id.themeList);
vh.questionList = (TextView) view.findViewById(R.id.questionList);
vh.reponseList = (TextView) view.findViewById(R.id.reponseList);
vh.difficulteList = (TextView) view.findViewById(R.id.difficultList);
vh.Supprimer = (Button) view.findViewById(R.id.buttonDelete);
vh.Modifier = (Button) view.findViewById(R.id.buttonModifier);
view.setTag(vh);
return view;
}
public void bindView(View view, Context Context, Cursor cursor) {
vh.idList.setText(cursor.getString(cursor.getColumnIndex(stock._ID)));
vh.themeList.setText(cursor.getString(cursor.getColumnIndex(stock.THEME)));
vh.questionList.setText(cursor.getString(cursor.getColumnIndex(stock.QUESTION)));
vh.reponseList.setText(cursor.getString(cursor.getColumnIndex(stock.REPONSE)));
vh.difficulteList.setText(cursor.getString(cursor.getColumnIndex(stock.DIFFICULTE)));
vh.Supprimer.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v) {
int id = Integer.parseInt(vh.idList.getText().toString());
Toast.makeText(container.getContext(), "bouton delete : "+id, Toast.LENGTH_LONG).show();
//Here everytime I hit the button, the last ID i put on the listView is displayed, no matter what Supprimer button I click
}
});
}
}
public class ViewHolder
{
Button Supprimer, Modifier;
TextView idList, themeList, questionList, reponseList, difficulteList;
}
}
这是我TextView
的布局:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/relativeList"
android:descendantFocusability="blocksDescendants">
<TextView
android:text="@string/difficult"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView8"
android:layout_below="@+id/textView7"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="29dp" />
<TextView
android:text="@string/r_ponse"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView7"
android:layout_marginTop="20dp"
android:layout_below="@+id/textView6"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/idList"
android:layout_alignParentTop="true"
android:layout_alignLeft="@+id/themeList"
android:layout_alignStart="@+id/themeList"
tools:ignore="HardcodedText" />
<TextView
android:text="Question :"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView6"
android:layout_marginTop="14dp"
android:layout_below="@+id/textView4"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
tools:ignore="HardcodedText" />
<TextView
android:text="@string/id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView3"
android:layout_alignParentTop="true"
android:layout_alignRight="@+id/textView4"
android:layout_alignEnd="@+id/textView4" />
<TextView
android:text="Thème :"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView4"
android:layout_below="@+id/textView3"
android:layout_alignRight="@+id/textView6"
android:layout_alignEnd="@+id/textView6"
tools:ignore="HardcodedText" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/textView6"
android:id="@+id/questionList"
android:layout_toRightOf="@+id/themeList"
android:layout_toEndOf="@+id/themeList" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textView8"
android:layout_alignLeft="@+id/questionList"
android:layout_alignStart="@+id/questionList"
android:id="@+id/reponseList" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/textView8"
android:layout_alignRight="@+id/reponseList"
android:layout_alignEnd="@+id/reponseList"
android:id="@+id/difficultList"
android:layout_toEndOf="@+id/reponseList"
android:layout_toRightOf="@+id/reponseList" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/themeList"
android:layout_marginLeft="33dp"
android:layout_marginStart="33dp"
tools:ignore="HardcodedText"
android:layout_below="@+id/idList"
android:layout_toRightOf="@+id/textView8"
android:layout_toEndOf="@+id/textView8" />
<Button
android:text="@string/supprimerb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:id="@+id/buttonDelete"/>
<Button
android:text="@string/modifierB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/buttonModifier"
android:layout_alignTop="@+id/questionList"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignLeft="@+id/buttonDelete"
android:layout_alignStart="@+id/buttonDelete" />
</RelativeLayout>
谢谢你的帮助!
答案 0 :(得分:1)
可能vh.idList
包含最后一个项目视图,该视图由newView
的最后一次调用提供。
使用findViewById
方法的v
和onClick
参数获取点击的行项ID:
public void onClick(View v) {
View parentView = (View)v.getParent();
TextView idList = parentView.findViewById(R.id.idList);
int id = Integer.parseInt(idList.getText().toString());
...
}